Moving? Don't forget to tell your bank. You could be hit with fees if your statement gets sent to your old address.

"When you're in the process of changing your address, your financial institutions should be at the top of the list of who to notify," said Greg McBride, a senior financial analyst at Bankrate.com.

U.S. Bank, for example, charges a $5 fee for the second and subsequent months that a statement is undeliverable. While some of the other megabanks don't charge for returned mail, many regional banks do.

"There are costs to handling returned mail, including the costs to try to track down new addresses so that important financial information gets to the customer and not someone hoping to engage in identity theft," said Nessa Feddis, vice president and senior council at American Bankers Association.

Those costs must be pretty high. FirstBank & Trust, Bank of Arkansas and Bank of Oklahoma charge undeliverable mail fees of $15. BankAtlantic charges a fee of up to $5.

And if your balance is low, fees like these could cause you to overdraft your account -- spiraling into a slew of extra charges.